Designed by Junichi Yananose, made by Eric Fuller.
(7 wood pieces, 3 inches)

Looks at first like a standard 6-piece burr. However, one of the apparent pieces is really two pieces (the one marked with a red dot in the above photo). Here is what the puzzle maker said:

"At first glimpse this puzzle looks like another 6 piece burr iteration. However, disassembly will show that it holds a surprise! One of the pieces has been split, creating a very unique 7 piece burr with quite a tricky solution. Internal voids make this a level 6 burr and also create many unassemblable solutions that will frustrate the solver. This is a difficult puzzle to solve."